AirHint found the following cheapest return flights from Tenerife (TFS) to Keflavik (KEF) in September 2025 (see full year).

Return flights

11 Sep - 13 Sep	Fly Play	direct
09 Sep - 13 Sep	Fly Play	direct
20 Sep - 29 Sep	Fly Play	direct
18 Sep - 20 Sep	Fly Play	direct
18 Sep - 30 Sep	Fly Play	direct
23 Sep - 04 Oct	Ryanair
23 Sep - 02 Oct	easyJet
10 Sep - 14 Sep	easyJet
30 Sep - 07 Oct	Ryanair
25 Sep - 02 Oct	Wizz Air Malta
16 Sep - 30 Sep	Ryanair
19 Sep - 21 Sep	Ryanair
13 Sep - 25 Sep	Fly Play	direct
13 Sep - 20 Sep	Fly Play	direct
23 Sep - 04 Oct	Fly Play	direct
30 Sep - 07 Oct	Icelandair	direct
25 Sep - 02 Oct	Icelandair	direct
23 Sep - 02 Oct	Icelandair	direct

Also check the deals for one-way flights from Tenerife to Keflavik in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Tenerife to Keflavik in September from 257€

Return flights